// card : elechouse pn532 card
// lib : https://github.com/elechouse/PN532
#include "emulatetag.h"
#include "NdefMessage.h"


#include <SPI.h>
#include <PN532_SPI.h>
#include "PN532.h"

PN532_SPI pn532spi(SPI, 5);
EmulateTag nfc(pn532spi);

uint8_t ndefBuf[120];
NdefMessage message;
int messageSize;

uint8_t uid[3] = { 0x12, 0x34, 0x56 };

void setup()
{
  Serial.begin(115200);
  Serial.println("------- Emulate Tag --------");

  message = NdefMessage();
  // Amanda B. Johnson's
  message.addUriRecord("dash:XuhHHnjLbm559kzByxtQ6gHMpjs32MHKb2?amount=0.01");
  messageSize = message.getEncodedSize();
  if (messageSize > sizeof(ndefBuf)) {
    Serial.println("ndefBuf is too small");
    while (1) { }
  }

  Serial.print("Ndef encoded message size: ");
  Serial.println(messageSize);

  message.encode(ndefBuf);

  // comment out this command for no ndef message
  nfc.setNdefFile(ndefBuf, messageSize);

  // uid must be 3 bytes!
  nfc.setUid(uid);

  nfc.init();
}

void loop() {
  // uncomment for overriding ndef in case a write to this tag occured
  //nfc.setNdefFile(ndefBuf, messageSize);

  // start emulation (blocks)
  nfc.emulate();

  // or start emulation with timeout
  /*if(!nfc.emulate(1000)){ // timeout 1 second
    Serial.println("timed out");
    }*/

  // deny writing to the tag
  // nfc.setTagWriteable(false);

  if (nfc.writeOccured()) {
    Serial.println("\nWrite occured !");
    uint8_t* tag_buf;
    uint16_t length;

    nfc.getContent(&tag_buf, &length);
    NdefMessage msg = NdefMessage(tag_buf, length);
    msg.print();
  }

  delay(1000);
}

